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disruptor.cpp
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disruptor.cpp
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#include "disruptor.h"
#include <iostream>
#include <thread>
using namespace std::chrono_literals;
int64_t SequenceBarrier::getMin() {
int64_t min_pos = std::numeric_limits<int64_t>::max();
for (auto cursor : limit_seq_) {
if (cursor.get()) {
auto pos = cursor->pos().acquire();
if (pos < min_pos) {
min_pos = pos;
}
} else {
break;
}
}
return last_min_ = min_pos;
}
int64_t SequenceBarrier::waitFor(int64_t pos) const {
if (last_min_ >= pos) {
return last_min_;
}
auto min_pos = std::numeric_limits<int64_t>::max();
for (auto cursor : limit_seq_) {
if (!cursor) {
break;
}
int tmp_pos = 0;
while (!((tmp_pos = cursor->pos().acquire()) >= pos)) {
std::cout << "BLOCKED - slowest cursor (" << cursor.get()
<< ") is still waiting to access sequence " << pos << std::endl;
getchar();
}
if (tmp_pos < min_pos) {
min_pos = tmp_pos;
}
}
if (min_pos == std::numeric_limits<int64_t>::max()) {
return min_pos;
}
return last_min_ = min_pos;
}